"""
打印三角形
"""
row = int(input('请输入行数:'))
for i in range(row):
    for j in range(i+1):
        print('*',end='')
    print()

for i in range(row):
    for j in range(row):
        if j<row -i-1:
            print(' ',end='')
        else:
            print('*',end='')
    print()

for i in range(row):
    for j in range(row - i - 1):
        print(' ',end='')
    for k in range(2 * i + 1):
        print('*',end='')
    print()